Motorcycle Repair: charging system, honda sl125, ac generator

Question
Hello, I have a Honda SL125 S0 motor that I have mounted on a three wheeler and I have had it running and it runs fine, however; it doesnt run for a very long time I figured it is the charging system because if i charge my battery back up it will run on the first kick and drive for a little while. My battery shows to be drained after it dies because it wont start again. i was wondering how do I check to see if the ac generator is producing enough juice and is there a way I can check to see if it is bad. I hooked up the wires correctly I believe. I ran a wire from the ac generator to an ac to dc device and to the battery to charge it. If you have any advice I would greatly appreciate it. Thank You.

Answer
Stephen, you're going to need to re-wire the whole charging system.  You can check the output by checking the AC outout of the alternator.  If there's voltage there, you have to make sure you have the regulator and rectifier wired correctly.  It would take too long to explain how that system works but if you have manuals, it will explain how those would have to be graphed together to.